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Finding the Fourth Proportional to 80,761.98, 111,432.48 and 67,890.18

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Solution

The fourth proportional to 80,761.98, 111,432.48 and 67,890.18 is: 93,672.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,761.98 : 111,432.48 = 67,890.18 : x
  2. Step 2: Convert to fraction form
    80,761.98/111,432.48 = 67,890.18/x
  3. Step 3: Cross multiply
    80,761.98x = 111,432.48 × 67,890.18
  4. Step 4: Simplify right side
    80,761.98x = 7,565,171,125.05
  5. Step 5: Solve for x
    x = 7,565,171,125.05/80,761.98
  6. Step 6: Final answer
    x = 93,672.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.